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net: fec: Call swap_buffer() prior to IP header alignment 

Commit 3ac72b7b63 ("net: fec: align IP header in hardware") breaks
networking on mx28.

There is an erratum on mx28 (ENGR121613 - ENET big endian mode
not compatible with ARM little endian) that requires an additional
byte-swap operation to workaround this problem.

So call swap_buffer() prior to performing the IP header alignment
to restore network functionality on mx28.

Fixes: 3ac72b7b63 ("net: fec: align IP header in hardware")
Reported-and-tested-by: Henri Roosen <henri.roosen@ginzinger.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fabio Estevam 2016-10-21 09:34:29 -02:00 committed by David S. Miller
parent b678aa578c
commit 235bde1ed3
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/freescale/fec_main.c
View File

@ -1430,14 +1430,14 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
skb_put(skb, pkt_len - 4);
data = skb->data;
if (!is_copybreak && need_swap)
swap_buffer(data, pkt_len);
#if !defined(CONFIG_M5272)
if (fep->quirks & FEC_QUIRK_HAS_RACC)
data = skb_pull_inline(skb, 2);
#endif
if (!is_copybreak && need_swap)
swap_buffer(data, pkt_len);
/* Extract the enhanced buffer descriptor */
ebdp = NULL;
if (fep->bufdesc_ex)